10A
Safety module CS AR-20 / CS AR-21
Module for emergency stops and end
position monitoring for movable guards
Main features
•For safety applications up to SIL CL 3/PL e
•Input with 1 or 2 channels
•Choice between automatic start, manual start
(CS AR-20 only) or monitored start (CS AR-21
only)
•Reduced housing width of 22.5 mm
•2 NO safety contacts
•Supply voltage:
24 Vac/dc, 120 Vac, 230 Vac
Utilization categories
Alternating current: AC15 (50…60 Hz)
Ue (V) 230
Ie (A) 3
Direct current: DC13 (6 oper. cycles/min.)
Ue (V) 24
Ie (A) 4
Quality marks and certificates:
Technical data
Housing
Polyamide housing PA 66, self-extinguishing V0 acc. to UL 94
Protection degree: IP40 (housing), IP20 (terminal strip)
Dimensions: see page 295, design A
General data
SIL CL: up to SIL CL 3 acc. to EN 62061
Performance Level (PL): up to PL e acc. to EN ISO 13849-1
Safety category: up to cat. 3 acc. to EN ISO 13849-1
Safety parameters: see page 349
Ambient temperature: -25°C…+55°C
Mechanical endurance: >10 million operating cycles
Electrical endurance: >100,000 operating cycles
Pollution degree: external 3, internal 2
Impulse withstand voltage (U
Rated insulation voltage (U
Overvoltage category: II
Weight: 0.2 kg
Supply
Rated supply voltage (U
Max. DC residual ripple in DC: 10%
Supply voltage tolerance: ±15% of U
Power consumption AC: < 5 VA
Power consumption DC: < 2 W
Control circuit
Protection against short circuits: PTC resistance, Ih=0.5 A
PTC times: Response time > 100 ms, release time > 3 s
Maximum resistance per input:
Current per input: 70 mA (typical)
Min. duration of start impulse t
Response time t
Release time in absence of power supply t
Simultaneity time t
: < 50 ms
A
: unlimited
C
In compliance with standards:
EN 60204-1, EN ISO 13855, EN 1037, EN ISO 12100, EN ISO 13850, EN 60529,
EN 61000-6-2, EN 61000-6-3, EN 61326-1, EN 60664-1, EN 60947-1, EN ISO 13849-1,
EN ISO 13849-2, EN 62061, UL 508, CSA C22.2 n° 14-95
): 4 kV
imp
): 250 V
i
): 24 Vac/dc; 50…60 Hz
n
120 Vac; 50…60 Hz
230 Vac; 50…60 Hz
n
50
: > 100 ms
MIN
: < 100 ms
R
EC type examination certificate: IMQ CP 432 DM
UL approval: E131787
CCC approval: 2013010305640211
EAC approval: RUC-IT.AД35.В.00454
Compliance with the requirements of:
Low Voltage Directive 2014/35/EU,
Machinery Directive 2006/42/EC,
EMC Directive 2014/30/EU
Code structure
CS AR-20V024
Start mode
20
manual or automatic start
21
monitored start
Connection type
V
Screw terminals
M Connector with screw terminals
X Connector with spring terminals
Output circuit
Output contacts: 2 NO safety contacts
Contact type: forcibly guided
Material of the contacts: gold-plated silver alloy
Maximum switching voltage: 230/240 Vac; 300 Vdc
Max. current per contact: 6 A
Conventional free air thermal current (Ith): 6 A
Max. total current Σ Ith
2
: 36 A
2
Minimum current: 10 mA
Contact resistance:
100 m
External protection fuse: 4 A
The number and the load capacity of output contacts can be increased by using expansion modules or
contactors. see page 241-250.
Stock items
CS AR-20V024
Supply voltage
024
24 Vac/dc
120
120 Vac
230
230 Vac
Features approved by UL
Rated supply voltage (Un): 24 Vac/dc; 50…60 Hz
120 Vac; 50…60 Hz
230 Vac; 50…60 Hz
Power consumption AC: < 5 VA
Power consumption DC: < 2 W
Maximum switching voltage: 230 Vac
Max. current per contact: 6 A
Utilization category C300
Notes:
- Use 60 or 75 °C copper (Cu) conductors, rigid or flexible, wire size 30-12 AWG.
- Tightening torque for terminal screws of 5-7 lb in.
- Only for 24 Vac/dc versions: power supply only with class 2 sources or with
limited voltage and energy. (Supply from Remote Class 2 Source or limited
voltage limited energy).
205
General Catalogue Safety 2017-2018
K1
K2
A1
S33
S34
13
23
24
14
A2
LED
CH1
LED
CH2
Safety module CS AR-20 / CS AR-21
Pin assignment
A1 13 23 S33
ITALY
PWR
CH1
CH2
Function diagrams
Configuration with automatic start (CS AR-20)
tCt
A
Configuration with monitored start (CS AR-21)
tRtCt
A
t
R
10A
CH1: A1
CH2: A2
13/14, 23/24
A2 14 24 S34
Internal block diagram
L / +
LED
PWR
N / -
Input configuration
LOGIC LOGIC
1 channel 2 channels
t
MIN
Configuration with manual start (CS AR-20)
t
A
Legend:
t
: Min. duration of start impulse
MIN
tC: simultaneity time
Notes:
The configurations with one channel are obtained taking into consideration the
CH1:A1 input only. In this case it is necessary to consider time tR referred to input
CH1:A1, time tA referred to input CH1:A1 and to the start, and time t
to the start.
Emergency stop circuits
Input configuration with manual start
CH1: A1
CH2: A2
S33/S34 (START)
13/14, 23/24
t
A
t
R
t
t
A
t
R
MIN
t
tR: release time in absence of
t
R
t
R
: response time
A
power supply
CH1: A1
CH2: A2
S33/S34 (START)
13/14, 23/24
referred
MIN
L / +
S33
A1
CS AR-20
S34
A2
N / -
The diagram does not show the exact position of the terminals in the product
Automatic start
With regard to the
indicated diagrams, bridge
the start button between
Monitored start
Use module CS AR-21 with the circuit diagrams
for manual start.
L/+
S33 and S34 in order to
activate the automatic
start module.
Items with code on green background are stock items
S34 S34
General Catalogue Safety 2017-2018
S33
A1
CS AR-20
A2 S34
N/-
Movable guard monitoring
The safety module can monitor emergency stop
circuits and control circuits for movable guards.
Replace the emergency stop contacts with the
switch contacts.
Application examples See page 251
206
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